2000 sportsman 500 clunking in transmission when turning hard left

Hi guys. I have a 2000 sportsman 500. I have been trying to get rid of the clunk in the rear end when I turn left. I have replaced both rear cv axles and changed the fluid while I was there. No major metal on the magnet. All the bushings look good and i greased everything. The noise is even worse now after I did all that! I used polaris brand fluid. The noise only appears when making a slow speed turn left in 2wd mode. Haven’t tried it in 4×4 because it sounds so bad I just parked it. The noise stops if I turn hard right and doesn’t happen at all going straight. I had the wife drive it in a slow circle and put my hand on the rear case. It seems to be coming from inside there. Any ideas? Google hasn’t been very helpful on this specific issue. Thank you!!